* {
  margin: 0;
  padding: 0;
}
.lf {
  float: left;
}
.lr {
  float: right;
}
.clearfix::after {
  content: "";
  display: block;
  clear: both;
}
.container {
  width: 960px;
  margin: 0 auto;
}

.logo,
.banner1,
.banner2 {
  background: #efefef;
  height: 80px;
  width: 200px;
  text-align: center;
  line-height: 80px;
}

.banner1 {
  display: inline-block;
  width: 540px;
  margin: 0 10px;
}

.menu {
  height: 30px;
  line-height: 30px;
  background: #efefef;
  margin: 10px 0;
  text-align: center;
}

.lf-item {
  height: 200px;
  width: 180px;
  border: 1px solid black;
  text-align: center;
  padding-top: 20px;
  margin-right: 10px;
  margin-bottom: 10px;
  box-sizing: border-box;
}

.lr-item {
  width: 200px;
  height: 130px;
  border: 1px solid black;
  text-align: center;
  padding-top: 20px;
  box-sizing: border-box;
  margin-bottom: 10px;
}

.footer {
  height: 60px;
  line-height: 60px;
  text-align: center;
  background: #efefef;
}
